zcash_client_backend::proposal

Struct Proposal

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pub struct Proposal<FeeRuleT, NoteRef> { /* private fields */ }
Expand description

A proposal for a series of transactions to be created.

Each step of the proposal represents a separate transaction to be created. At present, only transparent outputs of earlier steps may be spent in later steps; the ability to chain shielded transaction steps may be added in a future update.

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impl<FeeRuleT, NoteRef> Proposal<FeeRuleT, NoteRef>

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pub fn multi_step( fee_rule: FeeRuleT, min_target_height: BlockHeight, steps: NonEmpty<Step<NoteRef>>, ) -> Result<Self, ProposalError>

Constructs a validated multi-step Proposal.

This operation validates the proposal for agreement between outputs and inputs in the case of multi-step proposals, and ensures that no double-spends are being proposed.

Parameters:

  • fee_rule: The fee rule observed by the proposed transaction.
  • min_target_height: The minimum block height at which the transaction may be created.
  • steps: A vector of steps that make up the proposal.
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pub fn single_step( transaction_request: TransactionRequest, payment_pools: BTreeMap<usize, PoolType>, transparent_inputs: Vec<WalletTransparentOutput>, shielded_inputs: Option<ShieldedInputs<NoteRef>>, balance: TransactionBalance, fee_rule: FeeRuleT, min_target_height: BlockHeight, is_shielding: bool, ) -> Result<Self, ProposalError>

Constructs a validated Proposal having only a single step from its constituent parts.

This operation validates the proposal for balance consistency and agreement between the is_shielding flag and the structure of the proposal.

Parameters:

  • transaction_request: The ZIP 321 transaction request describing the payments to be made.
  • payment_pools: A map from payment index to pool type.
  • transparent_inputs: The set of previous transparent outputs to be spent.
  • shielded_inputs: The sets of previous shielded outputs to be spent.
  • balance: The change outputs to be added the transaction and the fee to be paid.
  • fee_rule: The fee rule observed by the proposed transaction.
  • min_target_height: The minimum block height at which the transaction may be created.
  • is_shielding: A flag that identifies whether this is a wallet-internal shielding transaction.
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pub fn fee_rule(&self) -> &FeeRuleT

Returns the fee rule to be used by the transaction builder.

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pub fn min_target_height(&self) -> BlockHeight

Returns the target height for which the proposal was prepared.

The chain must contain at least this many blocks in order for the proposal to be executed.

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pub fn steps(&self) -> &NonEmpty<Step<NoteRef>>

Returns the steps of the proposal. Each step corresponds to an independent transaction to be generated as a result of this proposal.

Trait Implementations§

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impl<FeeRuleT: Clone, NoteRef: Clone> Clone for Proposal<FeeRuleT, NoteRef>

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fn clone(&self) -> Proposal<FeeRuleT, NoteRef>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<FeeRuleT: Debug, NoteRef> Debug for Proposal<FeeRuleT, NoteRef>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<FeeRuleT: PartialEq, NoteRef: PartialEq> PartialEq for Proposal<FeeRuleT, NoteRef>

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fn eq(&self, other: &Proposal<FeeRuleT, NoteRef>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<FeeRuleT: Eq, NoteRef: Eq> Eq for Proposal<FeeRuleT, NoteRef>

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impl<FeeRuleT, NoteRef> StructuralPartialEq for Proposal<FeeRuleT, NoteRef>

Auto Trait Implementations§

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impl<FeeRuleT, NoteRef> Freeze for Proposal<FeeRuleT, NoteRef>
where FeeRuleT: Freeze, NoteRef: Freeze,

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impl<FeeRuleT, NoteRef> RefUnwindSafe for Proposal<FeeRuleT, NoteRef>
where FeeRuleT: RefUnwindSafe, NoteRef: RefUnwindSafe,

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impl<FeeRuleT, NoteRef> Send for Proposal<FeeRuleT, NoteRef>
where FeeRuleT: Send, NoteRef: Send,

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impl<FeeRuleT, NoteRef> Sync for Proposal<FeeRuleT, NoteRef>
where FeeRuleT: Sync, NoteRef: Sync,

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impl<FeeRuleT, NoteRef> Unpin for Proposal<FeeRuleT, NoteRef>
where FeeRuleT: Unpin, NoteRef: Unpin,

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impl<FeeRuleT, NoteRef> UnwindSafe for Proposal<FeeRuleT, NoteRef>
where FeeRuleT: UnwindSafe, NoteRef: UnwindSafe,

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